Star-Crossed Lovers

When you cast a creature spell, if you control no
creatures with lover counters on them, exile the
top card of your library until you reveal a
creature. You may cast that spell without paying
its mana cost. If you do, put a lover counter on
both creatures. Put the other exiled cards on the
bottom of your library. This ability only triggers
once per turn. Whenever a creature you control
with a lover counter dies, sacrifice the rest.
"There rust, and let me die"